For a patient who is not hospitalized overnight but who visits a hospital, clinic, or associated facility for diagnosis or treatment.

Twenty-four hour Holter monitoring is a continuous test to record your heart’s rate and rhythm for 24 hours. You wear the Holter monitor for 12 to 48 hours as you go about your normal daily routine.

An electrocardiogram (ECG) is a simple test that can be used to check your heart's rhythm and electrical activity.

X-ray is the starting point for diagnosing or screening of a variety of health issues, including pneumonia. X-ray technology is increasingly easily available to the medical community due to its low cost.

Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. 

Echocardiography uses standard two-dimensional, three-dimensional, and Doppler ultrasound to create images of the heart.

A cardiac stress test is a cardiological test that measures the heart's ability to respond to external stress in a controlled clinical environment. The stress response is induced by exercise or by intravenous pharmacological stimulation.

An endoscopy is used in medicine to look inside the body. The endoscopy procedure uses an endoscope to examine the interior of a hollow organ or cavity of the body. Unlike many other medical imaging techniques, endoscopes are inserted directly into the organ.